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|2x-3| = 9 Rezolvati aceasta ecuatie va roog :)

Răspuns :

2x-3=9|+3 2x=12|:2 X=6
|2x-3|=9⇔2x-3=+/-9
2x-3=9
x=6
sau
2x-3=-9
x=-3
S={-3;6}